Firstly, hard gainers struggle to gain weight because of their high metabolism.
This is usually the main cause why the person finds it hard to gain the weight he or she so desired.
A high metabolism is a high demand of calories from the skinny person's diet.
This will usually result in an assumption that the person is feeding himself enough calories every day when he is actually not.
This results in the body finding calories from other sources like breaking down excess muscle tissues and using the glycogen storage to fuel the body.
The fat cells available for people like this are also utilized daily whenever the body feels that it does not have enough energy to fuel the body.
The second reason why you might feel that you are growing slowly is because of a lack of sleep or a weak immune system.
The reason why sleep and a weak immune system are classified in one section is because it is related.
A lack of sleep will put additional stress on the body, thus making the immune system weaker, which usually results in the body not operating at its optimum level.
With a body struggling to keep up, it is only natural that it will not put on the weight that you try to hard day in and day out.
Even exercise can hamper the gaining of weight.
If there is an insufficient rest between exercises or exercising days, the body will soon dip into a state of over-training and soon will simply refuse to grow.
Imagine sprinting at your maximum when you are down with a fever.
You will not only perform badly, but also cause your fever to become worse.
It is the same with your body.
If you attempt to gain weight while you are sick, you are only looking for trouble by making your illness worse.
This goes also for your sleep.
If you do not rest enough after you exercise, you might as well not exercise at all because you are putting unnecessary strains on your body that is uncalled for.
Lastly, the reason why people are not growing is because they are applying the wrong system.
Many believe that just by overeating a meal or two, they will gain the weight you need.
However, this is far from the truth.
Overeating causes fat to develop as you utilize lesser than the calories you force into yourself, leading into unhealthy weight gain.
Even so, unhealthy weight gain takes years of abuse before the result shows physically in the mirror.
The actual way to gain weight is from packing on lean muscle mass as it is 3 times heavier than fat, making it a healthy and faster way to gain weight.